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改进玉米自交系常规选育技术的探讨 总被引：1，自引：0，他引：1
本文从玉米自交系的选育目标、基础材料的组建、自交系常规选育的技术路线和选育方法等方面，阐述了如何改进玉米自交系常规选育技术。提出了在自交系选育时要适当的近交和回交、注重从原有材料中选自然变异株和把目标性状逐步整合组装等技术路线。 相似文献
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随着种业市场的进一步开放,市场竞争也越来越激烈,品种选育也逐渐成为各种子企业和科研院所的首要工作。杂交水稻的生育特性决定了其品种选育是一个漫长而又复杂的过程,在选育过程中如果没有注重或者忽略了一些重要的技术要点和环节,选育结果往往与我们的选育初衷背道而驰,因此水稻品种选育技术要点的掌握就显得尤为重要,特别是新近毕业和 相似文献
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安麦1号选育技术与方法探讨 总被引：5，自引：2，他引：3
介绍了安麦1号的选育背景和育种目标，阐述了安麦1号的选育技术与方法。在此基础上，讨论了该选育技术和方法的可行性。认为这种选育技术和方法不失为作物育种工作手中的一种有效工具和手段。 相似文献
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就陕西关中地区夏玉米机械化籽粒收获品种的选育及推广现状进行了全面剖析,提出了制约玉米机械化籽粒收获品种选育的主要问题,并就今后玉米机械化籽粒收获品种的选育及推广工作提出了合理化建议。 相似文献
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<正>1海南制种基地的优越性海南具有全国独一无二的热带气候资源,全省规划优势农作物育制种基地12 667hm2,为各类作物优良新品种的研发提供了优越条件,已成为国内农作物品种选育的重要基地,是现代农业科技创新和新品种选育的"助推器"。利用海南特殊的自然条件在冬季加代繁殖和选育,新品种的选育时间缩短1/3~1/2,大大加快了品种选育进程。 相似文献
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耐密型玉米品种选育技术初探 总被引：1，自引：0，他引：1
概括耐密型玉米品种选育的意义、育种目标、实质,结合工作实际,提出自交系选育过程中应该注意的选育技术,总结了组配玉米杂交种、品种比较过程中运用的诸多技巧。 相似文献
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介绍了运用冷冻干燥技术进行速溶蛋花汤的加工,研究了生产工艺、特点以及影响产品质量的主要因素。试验表明,采用冷冻干燥技术加工的速溶蛋花汤,具有营养丰富、风味独特、方便快捷等特点。 相似文献
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DENG Zhao-jing 《保鲜与加工》2005,(1):153-156
A new definition of inertia,i.e. the momentum is the measuring of inertia of matter, is proposed. The article through and etc., subjects, the correctness of the new notion of inertia:The monentum is the measuring of inertia has been demonstrated, and the unsolved contradictions of the traditional definition of inetia. And the mass is the measuring of inertia has been revealed. 相似文献
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香蕉是热带亚热带发展中国家重要的粮食作物和碳水化合物来源。但近年来,香蕉生产受到严重的病虫危害。大多数香蕉栽培品种是三倍体,生长周期长,而且不孕。由于没有种子,给繁殖和育种带来一定的困难。遗传转化技术的发展为香蕉品种的改良提供了一种有效的手段。香蕉的遗传转化方法有电激法、基因枪法、农杆菌介导法等。农杆菌介导法的应用是香蕉品种改良的一个重大突破。香蕉遗传转化的外植体也发展到多种,有原生质体,胚性细胞悬浮系,分生组织,以及横切薄片等。近几年,随着分子生物学的发展,出现了转化效率更高,重复性更好的香蕉遗传转化技术。如农杆菌和基因枪结合法,离心辅助农杆菌介导法、真空渗透技术等。这些新技术新方法的出现,必将推动香蕉产业高速发展。 相似文献
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Automobile comfort dynamic simulation is necessary when we predict and evaluate the comfort of a automobile or optimize performance of automobile. The nine DOF vibration model of automobile is established , which acts root mean square value of body in multiple work conditions as comfort evaluation indices. Based on the comfort simulation, the Hongyan 1160 is predicted in the way of comfort. The programmes can be used in many different automobiles . The computational result indicates that the model can simulate vibration of automobile truly. It is significant to research automobile comfort evaluation to optimize performance of automobile and comfort simulation .The computational program can be applied to optimize or simulate which has some reference value. 相似文献
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南瓜降糖功能及其系列食品加工技术 总被引：3，自引：0，他引：3
阐述了南瓜在糖尿病辅助治疗方面的功能特性,介绍了南瓜降糖主要制品南瓜全粉、南瓜脆片、南瓜果酱和南瓜肉汁的工艺流程和操作要点。 相似文献
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母猪繁殖障碍成因分析 总被引：3，自引：0，他引：3
繁殖障碍是导致母猪淘汰的最主要因素,直接造成母猪非生产天数延长,繁殖猪群生产效率降低,严重影响猪场的经济效益。本文作者对引起母猪繁殖障碍的多方面因素,包括营养因素（如饲养水平、饲料品质、断奶日龄）、环境因素（如温度、湿度、通风、光照）、疫病因素、生产技术及管理因素进行了详细阐述。 相似文献
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Applicability of molecular markers in the context of protection of new varieties of cucumber 总被引：2，自引：0，他引：2
G. P. Bernet S. Bramardi D. Calvache E. A. Carbonell M. J. Asins 《Plant Breeding》2003,122(2):146-152
The growing number of candidate varieties presented every year at each national Plant Variety Protection Office and their decreasing genetic variability forces strategies to be adopted that will reduce costs without losing rigour when deciding about the acceptance or rejection of a candidate variety. Molecular markers have been envisaged as a reliable tool to establish differences, but can molecular markers be used for assessing distinctness? A comparison between a molecular and a morphological characterization of 41 seed samples belonging to 36 cucumber varieties and including several external controls has been carried out to investigate the applicability of molecular markers in the context of distinctness, uniformity and stability (DUS) tests and the protection of new varieties. Both types of character indicate the same relationships among main groups, Dutch and Beth‐Alpha types, and Gerking and Slice types, the correlation between distance matrices being only 0.6489. Varieties considered uniform for morphological traits proved not to be so for molecular markers. Therefore, molecular characterization is not offering the same estimates of uniformity and relatedness between varieties as does morphological characterization. External controls were used to establish distinction limits with morphological and molecular dendrograms to focus on those varieties, which were suspiciously similar. The results with cucumber show that molecular identity could be used to assess any lack of distinctness and so corroborate the morphological assessment of candidate varieties. The morphological trait ‘type’ provides distinct characterization of varieties and the molecular characterization of candidate varieties could be used to design better field experiments to assess distinction within each group of morphological cucumber type. 相似文献